成都市海产品中副溶血性弧菌耐药特征及多位点序列分型
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(1.四川农业大学食品学院,四川 雅安 625014;2.四川农业大学食品加工与安全研究所, 四川 雅安 625014;3.四川农业大学动物医学院,四川 成都 611130)

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尤祯丹 女 硕士生 研究方向为水产品质量安全控制 E-mail:9634246434@qq.com 韩国全 男 副教授 研究方向为微生物与食品安全及农产品加工与品质控制 E-mail:hans_980306@sicau.edu.cn

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Antimicrobial resistance and multilocus sequence typing analysis of Vibrio parahaemolyticus from seafood in Chengdu
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(1.Sichuan Agricultural University Food College, Sichuan Ya'an 625014,China;2.Institute of Food Processing and Safety of Sichuan Agricultural University, Sichuan Ya'an 625014,China;3.Sichuan Agricultural University College of Veterinary Medicine, Sichuan Chengdu 611130,China)

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    摘要:

    目的 了解成都市不同种类的海产品中副溶血性弧菌的污染程度、耐药情况、毒力基因分布、基因分型情况,为成都市食源性副溶血性弧菌流行及其风险评估提供基础数据。方法 参照GB 4789.7—2013《食品安全国家标准 食品微生物学检验 副溶血性弧菌检验》,从不同种类的海产品中分离副溶血性弧菌疑似菌株,通过生化试验及16S rDNA测序进行准确鉴定;采用纸片扩散法对分离株进行药敏试验,通过聚合酶链式反应(PCR)检测与其致病性相关的2个毒力基因,对分离株进行多位点序列分型分析。结果 从采集的380份海产品中共104份样品检出 副溶血性弧菌,总检出率为27.4%。药敏试验表明,97.1%(101/104)的分离株具有耐药性,其中对氨苄西林的耐药率最高(95.2%,99/104)。分离株trh基因携带率为12.5%(13/104),tdh基因携带率为1.0%(1/104);104株分离株共分为38个ST型,其中ST1801、ST392、ST413型分离率较高,分离株未出现流行克隆群。结论 流通过程中不同种类海产品副溶血性弧菌污染率、耐药情况、毒力基因分布存在差异,可能与养殖环境、运输条件等有关。

    Abstract:

    Objective To find out the contamination, antimicrobial resistance, virulence gene distribution and genotyping of Vibrio parahaemolyticus in different kinds of marine products in Chengdu. Increase the basic data on the prevalence and risk assessment of foodborne Vibrio parahaemolyticus in Chengdu. Methods According to GB 4789.7-2013, suspected strains of Vibrio parahaemolyticus were isolated from different marine products and accurately identified by biochemical tests and 16S rDNA sequencing. The antimicrobial resistance test of the isolated strains was carried out by Kirby-Bauer disk diffusion method. Two virulence genes related to its pathogenicity were detected by polymerase chain reaction(PCR), and then the isolated strains were typed by multilocus sequence typing. Results A total of 104 strains of Vibrio parahaemolyticus were isolated from 380 seafood samples collected, with an overall detection rate of 27.4%.Antimicrobial resistance test showed that 97.1%(101/104) of the isolates had resistance, of which the drug resistance rate to ampicillin was the highest (95.2%,99/104). The harboring rate of trh gene among the isolated strains was 12.5%(13/104), and was 0.1%(1/104) for tdh gene. 104 isolates were divided into 38 ST types, of which ST1801, ST392 and ST413 were at high level. No epidemic clone group was found in the isolates. Conclusion There were differences in the contamination rate, antimicrobial resistance, and virulence genes distribution of Vibrio parahaemolyticus in different kinds of marine products, which might be related to the breeding environment and transportation conditions.

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尤祯丹,蒋玉涵,陈传君,蒲春如,蒋艳,杜娟兰,邓英,张白玉,严立恒,韩国全,颜其贵.成都市海产品中副溶血性弧菌耐药特征及多位点序列分型[J].中国食品卫生杂志,2020,32(1):15-19.

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  • 收稿日期:2019-12-26
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  • 在线发布日期: 2020-02-25
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